TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

media: ar0521: don't overflow when checking PLL values

Browse Source 
commit 438d3085ba upstream.

The PLL checks are comparing 64 bit integers with 32 bit
ones, as reported by Coverity. Depending on the values of
the variables, this may underflow.

Fix it ensuring that both sides of the expression are u64.

Fixes: 852b50aeed ("media: On Semi AR0521 sensor driver")
Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mauro Carvalho Chehab
2024-10-15 11:38:10 +02:00
committed by Greg Kroah-Hartman
parent bd24d83371
commit a244b82d0a
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/media/i2c/ar0521.c
+2 -2
View File
@@ -257,10 +257,10 @@ static u32 calc_pll(struct ar0521_dev *sensor, u32 freq, u16 *pre_ptr, u16 *mult
continue; /* Minimum value */
if (new_mult > 254)
break; /* Maximum, larger pre won't work either */
if (sensor->extclk_freq * (u64)new_mult < AR0521_PLL_MIN *
if (sensor->extclk_freq * (u64)new_mult < (u64)AR0521_PLL_MIN *
new_pre)
continue;
if (sensor->extclk_freq * (u64)new_mult > AR0521_PLL_MAX *
if (sensor->extclk_freq * (u64)new_mult > (u64)AR0521_PLL_MAX *
new_pre)
break; /* Larger pre won't work either */
new_pll = div64_round_up(sensor->extclk_freq * (u64)new_mult,